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viddec: avoid renegotiation
Keep track of the context veriables and renegotiate when something changes. We need to use separate values for this because not all values can be copied into a GstVideoInfo. Set the output interlacing based on the libav context. Use the demuxer and decoder framerate to construct an output framerate. Use demuxer and decoder par to construct an output framerate.
This commit is contained in:
Wim Taymans
parent
83f57519b4
commit
db53c6e5ec
1 changed files with 172 additions and 64 deletions
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@ -58,7 +58,17 @@ struct _GstFFMpegVidDec
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AVFrame *picture;
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gboolean opened;
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enum PixelFormat pix_fmt;
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/* current context */
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enum PixelFormat ctx_pix_fmt;
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gint ctx_width;
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gint ctx_height;
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gint ctx_par_n;
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gint ctx_par_d;
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gint ctx_ticks;
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gint ctx_time_d;
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gint ctx_time_n;
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gint ctx_interlaced;
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gboolean waiting_for_key;
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/* for tracking DTS/PTS */
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@ -379,8 +389,6 @@ gst_ffmpegviddec_open (GstFFMpegVidDec * ffmpegdec)
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break;
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}
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ffmpegdec->pix_fmt = PIX_FMT_NB;
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return TRUE;
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/* ERRORS */
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@ -660,50 +668,174 @@ gst_ffmpegviddec_release_buffer (AVCodecContext * context, AVFrame * picture)
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}
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static gboolean
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gst_ffmpegviddec_negotiate (GstFFMpegVidDec * ffmpegdec, gboolean force)
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update_video_context (GstFFMpegVidDec * ffmpegdec, gboolean force)
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{
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GstVideoInfo *info;
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AVCodecContext *context = ffmpegdec->context;
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GstVideoFormat fmt;
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GstVideoCodecState *output_format;
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info = &ffmpegdec->input_state->info;
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if (!force && GST_VIDEO_INFO_WIDTH (info) == context->width
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&& GST_VIDEO_INFO_HEIGHT (info) == context->height
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&& GST_VIDEO_INFO_PAR_N (info) == context->sample_aspect_ratio.num
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&& GST_VIDEO_INFO_PAR_D (info) == context->sample_aspect_ratio.den
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&& ffmpegdec->pix_fmt == context->pix_fmt)
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return TRUE;
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if (!force && ffmpegdec->ctx_width == context->width
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&& ffmpegdec->ctx_height == context->height
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&& ffmpegdec->ctx_ticks == context->ticks_per_frame
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&& ffmpegdec->ctx_time_n == context->time_base.num
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&& ffmpegdec->ctx_time_d == context->time_base.den
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&& ffmpegdec->ctx_pix_fmt == context->pix_fmt
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&& ffmpegdec->ctx_par_n == context->sample_aspect_ratio.num
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&& ffmpegdec->ctx_par_d == context->sample_aspect_ratio.den)
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return FALSE;
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GST_DEBUG_OBJECT (ffmpegdec,
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"Renegotiating video from %dx%d@ (PAR %d:%d, %d/%d fps) to %dx%d@ (PAR %d:%d, %d/%d fps)",
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GST_VIDEO_INFO_WIDTH (info), GST_VIDEO_INFO_HEIGHT (info),
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GST_VIDEO_INFO_PAR_N (info), GST_VIDEO_INFO_PAR_D (info),
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GST_VIDEO_INFO_FPS_N (info), GST_VIDEO_INFO_FPS_D (info),
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"Renegotiating video from %dx%d@ %d:%d PAR %d/%d fps to %dx%d@ %d:%d PAR %d/%d fps pixfmt %d",
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ffmpegdec->ctx_width, ffmpegdec->ctx_height,
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ffmpegdec->ctx_par_n, ffmpegdec->ctx_par_d,
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ffmpegdec->ctx_time_n, ffmpegdec->ctx_time_d,
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context->width, context->height,
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context->sample_aspect_ratio.num,
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context->sample_aspect_ratio.den, -1, -1);
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context->sample_aspect_ratio.den,
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context->time_base.num, context->time_base.den, context->pix_fmt);
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/* Remember current pix_fmt */
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ffmpegdec->pix_fmt = context->pix_fmt;
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fmt = gst_ffmpeg_pixfmt_to_videoformat (context->pix_fmt);
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ffmpegdec->ctx_width = context->width;
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ffmpegdec->ctx_height = context->height;
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ffmpegdec->ctx_ticks = context->ticks_per_frame;
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ffmpegdec->ctx_time_n = context->time_base.num;
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ffmpegdec->ctx_time_d = context->time_base.den;
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ffmpegdec->ctx_pix_fmt = context->pix_fmt;
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ffmpegdec->ctx_par_n = context->sample_aspect_ratio.num;
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ffmpegdec->ctx_par_d = context->sample_aspect_ratio.den;
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return TRUE;
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}
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static void
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gst_ffmpegviddec_update_par (GstFFMpegVidDec * ffmpegdec,
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GstVideoInfo * in_info, GstVideoInfo * out_info)
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{
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gboolean demuxer_par_set = FALSE;
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gboolean decoder_par_set = FALSE;
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gint demuxer_num = 1, demuxer_denom = 1;
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gint decoder_num = 1, decoder_denom = 1;
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if (in_info->par_n && in_info->par_d) {
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demuxer_num = in_info->par_n;
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demuxer_denom = in_info->par_d;
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demuxer_par_set = TRUE;
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GST_DEBUG_OBJECT (ffmpegdec, "Demuxer PAR: %d:%d", demuxer_num,
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demuxer_denom);
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}
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if (ffmpegdec->ctx_par_n && ffmpegdec->ctx_par_d) {
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decoder_num = ffmpegdec->ctx_par_n;
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decoder_denom = ffmpegdec->ctx_par_d;
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decoder_par_set = TRUE;
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GST_DEBUG_OBJECT (ffmpegdec, "Decoder PAR: %d:%d", decoder_num,
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decoder_denom);
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}
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if (!demuxer_par_set && !decoder_par_set)
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goto no_par;
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if (demuxer_par_set && !decoder_par_set)
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goto use_demuxer_par;
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if (decoder_par_set && !demuxer_par_set)
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goto use_decoder_par;
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/* Both the demuxer and the decoder provide a PAR. If one of
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* the two PARs is 1:1 and the other one is not, use the one
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* that is not 1:1. */
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if (demuxer_num == demuxer_denom && decoder_num != decoder_denom)
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goto use_decoder_par;
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if (decoder_num == decoder_denom && demuxer_num != demuxer_denom)
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goto use_demuxer_par;
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/* Both PARs are non-1:1, so use the PAR provided by the demuxer */
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goto use_demuxer_par;
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use_decoder_par:
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{
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GST_DEBUG_OBJECT (ffmpegdec,
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"Setting decoder provided pixel-aspect-ratio of %u:%u", decoder_num,
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decoder_denom);
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out_info->par_n = decoder_num;
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out_info->par_d = decoder_denom;
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return;
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}
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use_demuxer_par:
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{
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GST_DEBUG_OBJECT (ffmpegdec,
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"Setting demuxer provided pixel-aspect-ratio of %u:%u", demuxer_num,
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demuxer_denom);
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out_info->par_n = demuxer_num;
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out_info->par_d = demuxer_denom;
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return;
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}
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no_par:
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{
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GST_DEBUG_OBJECT (ffmpegdec,
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"Neither demuxer nor codec provide a pixel-aspect-ratio");
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out_info->par_n = 1;
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out_info->par_d = 1;
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return;
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}
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}
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static gboolean
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gst_ffmpegviddec_negotiate (GstFFMpegVidDec * ffmpegdec, gboolean force)
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{
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GstVideoFormat fmt;
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GstVideoInfo *in_info, *out_info;
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GstVideoCodecState *output_state;
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gint fps_n, fps_d;
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if (!update_video_context (ffmpegdec, force))
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return TRUE;
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fmt = gst_ffmpeg_pixfmt_to_videoformat (ffmpegdec->ctx_pix_fmt);
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if (G_UNLIKELY (fmt == GST_VIDEO_FORMAT_UNKNOWN))
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goto unknown_format;
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output_format =
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output_state =
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gst_video_decoder_set_output_state (GST_VIDEO_DECODER (ffmpegdec), fmt,
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ffmpegdec->context->width, ffmpegdec->context->height,
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ffmpegdec->input_state);
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if (context->sample_aspect_ratio.num) {
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GST_VIDEO_INFO_PAR_N (&output_format->info) =
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context->sample_aspect_ratio.num;
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GST_VIDEO_INFO_PAR_D (&output_format->info) =
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context->sample_aspect_ratio.den;
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}
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ffmpegdec->ctx_width, ffmpegdec->ctx_height, ffmpegdec->input_state);
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if (ffmpegdec->output_state)
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gst_video_codec_state_unref (ffmpegdec->output_state);
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ffmpegdec->output_state = output_format;
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ffmpegdec->output_state = output_state;
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in_info = &ffmpegdec->input_state->info;
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out_info = &ffmpegdec->output_state->info;
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/* set the interlaced flag */
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if (ffmpegdec->ctx_interlaced)
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out_info->interlace_mode = GST_VIDEO_INTERLACE_MODE_MIXED;
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else
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out_info->interlace_mode = GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
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/* try to find a good framerate */
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if (in_info->fps_d) {
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/* take framerate from input when it was specified (#313970) */
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fps_n = in_info->fps_n;
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fps_d = in_info->fps_d;
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} else {
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fps_n = ffmpegdec->ctx_time_d / ffmpegdec->ctx_ticks;
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fps_d = ffmpegdec->ctx_time_n;
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if (!fps_d) {
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GST_LOG_OBJECT (ffmpegdec, "invalid framerate: %d/0, -> %d/1", fps_n,
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fps_n);
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fps_d = 1;
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}
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if (gst_util_fraction_compare (fps_n, fps_d, 1000, 1) > 0) {
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GST_LOG_OBJECT (ffmpegdec, "excessive framerate: %d/%d, -> 0/1", fps_n,
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fps_d);
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fps_n = 0;
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fps_d = 1;
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}
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}
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GST_LOG_OBJECT (ffmpegdec, "setting framerate: %d/%d", fps_n, fps_d);
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out_info->fps_n = fps_n;
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out_info->fps_d = fps_d;
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/* calculate and update par now */
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gst_ffmpegviddec_update_par (ffmpegdec, in_info, out_info);
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return TRUE;
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@ -720,7 +852,7 @@ unknown_format:
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*
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* Sets the skip_frame flag and if things are really bad, skips to the next
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* keyframe.
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*
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*
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* Returns TRUE if the frame should be decoded, FALSE if the frame can be dropped
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* entirely.
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*/
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@ -1017,21 +1149,13 @@ gst_ffmpegviddec_video_frame (GstFFMpegVidDec * ffmpegdec,
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GST_DEBUG_OBJECT (ffmpegdec, "repeat_pict:%d",
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ffmpegdec->picture->repeat_pict);
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GST_DEBUG_OBJECT (ffmpegdec, "interlaced_frame:%d (current:%d)",
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ffmpegdec->picture->interlaced_frame,
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GST_VIDEO_INFO_IS_INTERLACED (&ffmpegdec->input_state->info));
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ffmpegdec->picture->interlaced_frame, ffmpegdec->ctx_interlaced);
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if (G_UNLIKELY (ffmpegdec->input_state
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&& ffmpegdec->picture->interlaced_frame !=
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GST_VIDEO_INFO_IS_INTERLACED (&ffmpegdec->input_state->info))) {
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if (G_UNLIKELY (ffmpegdec->picture->interlaced_frame !=
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ffmpegdec->ctx_interlaced)) {
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GST_WARNING ("Change in interlacing ! picture:%d, recorded:%d",
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ffmpegdec->picture->interlaced_frame,
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GST_VIDEO_INFO_IS_INTERLACED (&ffmpegdec->input_state->info));
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if (ffmpegdec->picture->interlaced_frame)
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GST_VIDEO_INFO_INTERLACE_MODE (&ffmpegdec->input_state->info) =
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GST_VIDEO_INTERLACE_MODE_INTERLEAVED;
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else
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GST_VIDEO_INFO_INTERLACE_MODE (&ffmpegdec->input_state->info) =
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GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
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ffmpegdec->picture->interlaced_frame, ffmpegdec->ctx_interlaced);
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ffmpegdec->ctx_interlaced = ffmpegdec->picture->interlaced_frame;
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if (!gst_ffmpegviddec_negotiate (ffmpegdec, TRUE))
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goto negotiation_error;
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}
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@ -1042,22 +1166,6 @@ gst_ffmpegviddec_video_frame (GstFFMpegVidDec * ffmpegdec,
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if (G_UNLIKELY (*ret != GST_FLOW_OK))
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goto no_output;
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if (G_UNLIKELY (ffmpegdec->input_state
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&& ffmpegdec->picture->interlaced_frame !=
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GST_VIDEO_INFO_IS_INTERLACED (&ffmpegdec->input_state->info))) {
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GST_WARNING ("Change in interlacing ! picture:%d, recorded:%d",
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ffmpegdec->picture->interlaced_frame,
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GST_VIDEO_INFO_IS_INTERLACED (&ffmpegdec->input_state->info));
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if (ffmpegdec->picture->interlaced_frame)
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GST_VIDEO_INFO_INTERLACE_MODE (&ffmpegdec->input_state->info) =
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GST_VIDEO_INTERLACE_MODE_INTERLEAVED;
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else
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GST_VIDEO_INFO_INTERLACE_MODE (&ffmpegdec->input_state->info) =
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GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
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if (!gst_ffmpegviddec_negotiate (ffmpegdec, TRUE))
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goto negotiation_error;
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}
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/* check if we are dealing with a keyframe here, this will also check if we
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* are dealing with B frames. */
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iskeyframe = check_keyframe (ffmpegdec);
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@ -1417,8 +1525,8 @@ gst_ffmpegviddec_decide_allocation (GstVideoDecoder * decoder, GstQuery * query)
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avcodec_align_dimensions2 (ffmpegdec->context, &width, &height,
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linesize_align);
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edge =
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ffmpegdec->
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context->flags & CODEC_FLAG_EMU_EDGE ? 0 : avcodec_get_edge_width ();
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ffmpegdec->context->
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flags & CODEC_FLAG_EMU_EDGE ? 0 : avcodec_get_edge_width ();
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/* increase the size for the padding */
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width += edge << 1;
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height += edge << 1;
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